Thanks for this bit of sanity. I was losing my mind trying to think up an explanation as to why that comment wasn't flagged or inundated with comments pointing out the sheer stupidity and inhumane arrogance.
I don't want to be overly dramatic, but this has genuinely lowered my view of HN as a whole, and I'll think twice about reading the comments here from now on.
If I were to show this to any well-adjusted person I know, they'd probably think less of me for even being in the same community and profession as the person who wrote that comment.